The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 03, 1999
Filed:
Apr. 29, 1998
Sick AG, Waldkirch, DE;
Abstract
The invention relates to a method of operating an opto-electronic sensor, in particular a light barrier, in which a light signal is transmitted by means of a light transmitter into a monitored region and a light receiver designed to receive transmitted and reflected light signals delivers a signal, the amplitude of which is investigated for the presence of an object in the monitored region, wherein an object detection signal is transmitted when an amplitude threshold value is exceeded or fallen short of, wherein, before taking the sensor into operation, the threshold is automatically set in dependence on amplitude values which occur in a predetermined measurement time interval in the context of an initialization process with an object-free monitored region, and is thereby adapted to the operating conditions which exist during the initialization process, or wherein the threshold value is automatically adjusted during the sensor operation in dependence on amplitude values which have occurred in a specific measurement time interval and are thereby adapted to the respectively prevailing operating conditions.